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-rw-r--r--third_party/immer/extra/fuzzer/CMakeLists.txt29
-rw-r--r--third_party/immer/extra/fuzzer/array-gc.cpp103
-rw-r--r--third_party/immer/extra/fuzzer/array.cpp80
-rw-r--r--third_party/immer/extra/fuzzer/flex-vector-gc.cpp162
-rw-r--r--third_party/immer/extra/fuzzer/flex-vector.cpp150
-rw-r--r--third_party/immer/extra/fuzzer/fuzzer_input.hpp62
-rw-r--r--third_party/immer/extra/fuzzer/map-gc.cpp93
-rw-r--r--third_party/immer/extra/fuzzer/map.cpp85
-rw-r--r--third_party/immer/extra/fuzzer/set-gc.cpp78
-rw-r--r--third_party/immer/extra/fuzzer/set.cpp70
-rw-r--r--third_party/immer/extra/fuzzer/vector-gc.cpp104
-rw-r--r--third_party/immer/extra/fuzzer/vector.cpp82
12 files changed, 0 insertions, 1098 deletions
diff --git a/third_party/immer/extra/fuzzer/CMakeLists.txt b/third_party/immer/extra/fuzzer/CMakeLists.txt
deleted file mode 100644
index 777289f8a12d..000000000000
--- a/third_party/immer/extra/fuzzer/CMakeLists.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-
-add_custom_target(fuzzers
-  COMMENT "Build all fuzzers.")
-
-if (CHECK_FUZZERS)
-  add_dependencies(tests fuzzers)
-endif()
-
-# LIB_FUZZING_ENGINE is set by the Google OSS-Fuzz
-# infrastructure. Otherwise we use Clang's LibFuzzer
-if (DEFINED ENV{LIB_FUZZING_ENGINE})
-  set(immer_fuzzing_engine $ENV{LIB_FUZZING_ENGINE})
-else()
-  set(immer_fuzzing_engine "-fsanitize=fuzzer")
-endif()
-
-file(GLOB_RECURSE immer_fuzzers "*.cpp")
-foreach(_file IN LISTS immer_fuzzers)
-  immer_target_name_for(_target _output "${_file}")
-  add_executable(${_target} EXCLUDE_FROM_ALL "${_file}")
-  set_target_properties(${_target} PROPERTIES OUTPUT_NAME ${_output})
-  target_compile_options(${_target} PUBLIC ${immer_fuzzing_engine})
-  target_link_libraries(${_target} PUBLIC ${immer_fuzzing_engine}
-    immer-dev)
-  add_dependencies(fuzzers ${_target})
-  if (CHECK_FUZZERS)
-    add_test("fuzzer/${_output}" ${_output} -max_total_time=1)
-  endif()
-endforeach()
diff --git a/third_party/immer/extra/fuzzer/array-gc.cpp b/third_party/immer/extra/fuzzer/array-gc.cpp
deleted file mode 100644
index b93721225288..000000000000
--- a/third_party/immer/extra/fuzzer/array-gc.cpp
+++ /dev/null
@@ -1,103 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/array.hpp>
-#include <immer/array_transient.hpp>
-#include <immer/heap/gc_heap.hpp>
-#include <immer/refcount/no_refcount_policy.hpp>
-
-#include <array>
-
-using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
-                                       immer::no_refcount_policy,
-                                       immer::gc_transience_policy,
-                                       false>;
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-
-    using array_t     = immer::array<int, gc_memory>;
-    using transient_t = typename array_t::transient_type;
-    using size_t      = std::uint8_t;
-
-    auto vs = std::array<array_t, var_count>{};
-    auto ts = std::array<transient_t, var_count>{};
-
-    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
-    auto is_valid_index = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
-    };
-    auto is_valid_size = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
-    };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_transient,
-            op_persistent,
-            op_push_back,
-            op_update,
-            op_take,
-            op_push_back_mut,
-            op_update_mut,
-            op_take_mut,
-        };
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_transient: {
-            auto src = read<char>(in, is_valid_var);
-            ts[dst]  = vs[src].transient();
-            break;
-        }
-        case op_persistent: {
-            auto src = read<char>(in, is_valid_var);
-            vs[dst]  = ts[src].persistent();
-            break;
-        }
-        case op_push_back: {
-            auto src = read<char>(in, is_valid_var);
-            vs[dst]  = vs[src].push_back(42);
-            break;
-        }
-        case op_update: {
-            auto src = read<char>(in, is_valid_var);
-            auto idx = read<size_t>(in, is_valid_index(vs[src]));
-            vs[dst]  = vs[src].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take: {
-            auto src = read<char>(in, is_valid_var);
-            auto idx = read<size_t>(in, is_valid_size(vs[src]));
-            vs[dst]  = vs[src].take(idx);
-            break;
-        }
-        case op_push_back_mut: {
-            ts[dst].push_back(13);
-            break;
-        }
-        case op_update_mut: {
-            auto idx = read<size_t>(in, is_valid_index(ts[dst]));
-            ts[dst].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take_mut: {
-            auto idx = read<size_t>(in, is_valid_size(ts[dst]));
-            ts[dst].take(idx);
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/array.cpp b/third_party/immer/extra/fuzzer/array.cpp
deleted file mode 100644
index 094d97b7f425..000000000000
--- a/third_party/immer/extra/fuzzer/array.cpp
+++ /dev/null
@@ -1,80 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/array.hpp>
-
-#include <array>
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-
-    using array_t = immer::array<int, immer::default_memory_policy>;
-    using size_t  = std::uint8_t;
-
-    auto vars = std::array<array_t, var_count>{};
-
-    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
-    auto is_valid_index = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
-    };
-    auto is_valid_size = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
-    };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_push_back,
-            op_update,
-            op_take,
-            op_push_back_move,
-            op_update_move,
-            op_take_move,
-        };
-        auto src = read<char>(in, is_valid_var);
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_push_back: {
-            vars[dst] = vars[src].push_back(42);
-            break;
-        }
-        case op_update: {
-            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
-            vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = vars[src].take(idx);
-            break;
-        }
-        case op_push_back_move: {
-            vars[dst] = std::move(vars[src]).push_back(12);
-            break;
-        }
-        case op_update_move: {
-            auto idx = read<size_t>(in, is_valid_index(vars[src]));
-            vars[dst] =
-                std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take_move: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = std::move(vars[src]).take(idx);
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/flex-vector-gc.cpp b/third_party/immer/extra/fuzzer/flex-vector-gc.cpp
deleted file mode 100644
index 00c302898675..000000000000
--- a/third_party/immer/extra/fuzzer/flex-vector-gc.cpp
+++ /dev/null
@@ -1,162 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/flex_vector.hpp>
-#include <immer/flex_vector_transient.hpp>
-#include <immer/heap/gc_heap.hpp>
-#include <immer/refcount/no_refcount_policy.hpp>
-
-#include <array>
-
-using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
-                                       immer::no_refcount_policy,
-                                       immer::gc_transience_policy,
-                                       false>;
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-    constexpr auto bits      = 2;
-
-    using vector_t    = immer::flex_vector<int, gc_memory, bits, bits>;
-    using transient_t = typename vector_t::transient_type;
-    using size_t      = std::uint8_t;
-
-    auto vs = std::array<vector_t, var_count>{};
-    auto ts = std::array<transient_t, var_count>{};
-
-    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
-    auto is_valid_var_neq = [](auto other) {
-        return [=](auto idx) {
-            return idx >= 0 && idx < var_count && idx != other;
-        };
-    };
-    auto is_valid_index = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
-    };
-    auto is_valid_size = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
-    };
-    auto can_concat = [](auto&& v1, auto&& v2) {
-        using size_type = decltype(v1.size());
-        auto max        = std::numeric_limits<size_type>::max() >> (bits * 4);
-        return v1.size() < max && v2.size() < max;
-    };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_transient,
-            op_persistent,
-            op_push_back,
-            op_update,
-            op_take,
-            op_drop,
-            op_concat,
-            op_push_back_mut,
-            op_update_mut,
-            op_take_mut,
-            op_drop_mut,
-            op_prepend_mut,
-            op_prepend_mut_move,
-            op_append_mut,
-            op_append_mut_move,
-        };
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_transient: {
-            auto src = read<char>(in, is_valid_var);
-            ts[dst]  = vs[src].transient();
-            break;
-        }
-        case op_persistent: {
-            auto src = read<char>(in, is_valid_var);
-            vs[dst]  = ts[src].persistent();
-            break;
-        }
-        case op_push_back: {
-            auto src = read<char>(in, is_valid_var);
-            vs[dst]  = vs[src].push_back(42);
-            break;
-        }
-        case op_update: {
-            auto src = read<char>(in, is_valid_var);
-            auto idx = read<size_t>(in, is_valid_index(vs[src]));
-            vs[dst]  = vs[src].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take: {
-            auto src = read<char>(in, is_valid_var);
-            auto idx = read<size_t>(in, is_valid_size(vs[src]));
-            vs[dst]  = vs[src].take(idx);
-            break;
-        }
-        case op_drop: {
-            auto src = read<char>(in, is_valid_var);
-            auto idx = read<size_t>(in, is_valid_size(vs[src]));
-            vs[dst]  = vs[src].drop(idx);
-            break;
-        }
-        case op_concat: {
-            auto src  = read<char>(in, is_valid_var);
-            auto src2 = read<char>(in, is_valid_var);
-            if (can_concat(vs[src], vs[src2]))
-                vs[dst] = vs[src] + vs[src2];
-            break;
-        }
-        case op_push_back_mut: {
-            ts[dst].push_back(13);
-            break;
-        }
-        case op_update_mut: {
-            auto idx = read<size_t>(in, is_valid_index(ts[dst]));
-            ts[dst].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take_mut: {
-            auto idx = read<size_t>(in, is_valid_size(ts[dst]));
-            ts[dst].take(idx);
-            break;
-        }
-        case op_prepend_mut: {
-            auto src = read<char>(in, is_valid_var_neq(dst));
-            if (can_concat(ts[dst], ts[src]))
-                ts[dst].prepend(ts[src]);
-            break;
-        }
-        case op_prepend_mut_move: {
-            auto src = read<char>(in, is_valid_var_neq(dst));
-            if (can_concat(ts[dst], ts[src])) {
-                ts[dst].prepend(std::move(ts[src]));
-                ts[src] = {};
-            }
-            break;
-        }
-        case op_append_mut: {
-            auto src = read<char>(in, is_valid_var_neq(dst));
-            if (can_concat(ts[dst], ts[src]))
-                ts[dst].append(ts[src]);
-            break;
-        }
-        case op_append_mut_move: {
-            auto src = read<char>(in, is_valid_var_neq(dst));
-            if (can_concat(ts[dst], ts[src])) {
-                ts[dst].append(std::move(ts[src]));
-                ts[src] = {};
-            }
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/flex-vector.cpp b/third_party/immer/extra/fuzzer/flex-vector.cpp
deleted file mode 100644
index 14395de1d5ae..000000000000
--- a/third_party/immer/extra/fuzzer/flex-vector.cpp
+++ /dev/null
@@ -1,150 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/box.hpp>
-#include <immer/flex_vector.hpp>
-
-#include <array>
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 8;
-    constexpr auto bits      = 2;
-
-    using vector_t =
-        immer::flex_vector<int, immer::default_memory_policy, bits, bits>;
-    using size_t = std::uint8_t;
-
-    auto vars = std::array<vector_t, var_count>{};
-
-    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
-    auto is_valid_var_neq = [](auto other) {
-        return [=](auto idx) {
-            return idx >= 0 && idx < var_count && idx != other;
-        };
-    };
-    auto is_valid_index = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
-    };
-    auto is_valid_size = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
-    };
-    auto can_concat = [](auto&& v1, auto&& v2) {
-        using size_type = decltype(v1.size());
-        auto max        = std::numeric_limits<size_type>::max() >> (bits * 4);
-        return v1.size() < max && v2.size() < max;
-    };
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_push_back,
-            op_update,
-            op_take,
-            op_drop,
-            op_concat,
-            op_push_back_move,
-            op_update_move,
-            op_take_move,
-            op_drop_move,
-            op_concat_move_l,
-            op_concat_move_r,
-            op_concat_move_lr,
-            op_insert,
-            op_erase,
-            op_compare,
-        };
-        auto src = read<char>(in, is_valid_var);
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_push_back: {
-            vars[dst] = vars[src].push_back(42);
-            break;
-        }
-        case op_update: {
-            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
-            vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = vars[src].take(idx);
-            break;
-        }
-        case op_drop: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = vars[src].drop(idx);
-            break;
-        }
-        case op_concat: {
-            auto src2 = read<char>(in, is_valid_var);
-            if (can_concat(vars[src], vars[src2]))
-                vars[dst] = vars[src] + vars[src2];
-            break;
-        }
-        case op_push_back_move: {
-            vars[dst] = std::move(vars[src]).push_back(21);
-            break;
-        }
-        case op_update_move: {
-            auto idx = read<size_t>(in, is_valid_index(vars[src]));
-            vars[dst] =
-                std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take_move: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = std::move(vars[src]).take(idx);
-            break;
-        }
-        case op_drop_move: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = std::move(vars[src]).drop(idx);
-            break;
-        }
-        case op_concat_move_l: {
-            auto src2 = read<char>(in, is_valid_var_neq(src));
-            if (can_concat(vars[src], vars[src2]))
-                vars[dst] = std::move(vars[src]) + vars[src2];
-            break;
-        }
-        case op_concat_move_r: {
-            auto src2 = read<char>(in, is_valid_var_neq(src));
-            if (can_concat(vars[src], vars[src2]))
-                vars[dst] = vars[src] + std::move(vars[src2]);
-            break;
-        }
-        case op_concat_move_lr: {
-            auto src2 = read<char>(in, is_valid_var_neq(src));
-            if (can_concat(vars[src], vars[src2]))
-                vars[dst] = std::move(vars[src]) + std::move(vars[src2]);
-        }
-        case op_compare: {
-            using std::swap;
-            if (vars[src] == vars[dst])
-                swap(vars[src], vars[dst]);
-            break;
-        }
-        case op_erase: {
-            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
-            vars[dst] = vars[src].erase(idx);
-            break;
-        }
-        case op_insert: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = vars[src].insert(idx, immer::box<int>{42});
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/fuzzer_input.hpp b/third_party/immer/extra/fuzzer/fuzzer_input.hpp
deleted file mode 100644
index 485b7dc72b44..000000000000
--- a/third_party/immer/extra/fuzzer/fuzzer_input.hpp
+++ /dev/null
@@ -1,62 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#pragma once
-
-#include <cstdint>
-#include <stdexcept>
-
-struct no_more_input : std::exception
-{};
-
-struct fuzzer_input
-{
-    const std::uint8_t* data_;
-    std::size_t size_;
-
-    const std::uint8_t* next(std::size_t size)
-    {
-        if (size_ < size)
-            throw no_more_input{};
-        auto r = data_;
-        data_ += size;
-        size_ -= size;
-        return r;
-    }
-
-    const std::uint8_t* next(std::size_t size, std::size_t align)
-    {
-        auto rem = size % align;
-        if (rem)
-            next(align - rem);
-        return next(size);
-    }
-
-    template <typename Fn>
-    int run(Fn step)
-    {
-        try {
-            while (step(*this))
-                continue;
-        } catch (const no_more_input&) {};
-        return 0;
-    }
-};
-
-template <typename T>
-const T& read(fuzzer_input& fz)
-{
-    return *reinterpret_cast<const T*>(fz.next(sizeof(T), alignof(T)));
-}
-
-template <typename T, typename Cond>
-T read(fuzzer_input& fz, Cond cond)
-{
-    auto x = read<T>(fz);
-    return cond(x) ? x : read<T>(fz, cond);
-}
diff --git a/third_party/immer/extra/fuzzer/map-gc.cpp b/third_party/immer/extra/fuzzer/map-gc.cpp
deleted file mode 100644
index 835f37a05897..000000000000
--- a/third_party/immer/extra/fuzzer/map-gc.cpp
+++ /dev/null
@@ -1,93 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/heap/gc_heap.hpp>
-#include <immer/map.hpp>
-#include <immer/refcount/no_refcount_policy.hpp>
-
-#include <array>
-
-using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
-                                       immer::no_refcount_policy,
-                                       immer::gc_transience_policy,
-                                       false>;
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-
-    using map_t =
-        immer::map<char, int, std::hash<char>, std::equal_to<char>, gc_memory>;
-
-    auto vars = std::array<map_t, var_count>{};
-
-    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_set,
-            op_erase,
-            op_set_move,
-            op_erase_move,
-            op_iterate,
-            op_find,
-            op_update
-        };
-        auto src = read<char>(in, is_valid_var);
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_set: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].set(value, 42);
-            break;
-        }
-        case op_erase: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].erase(value);
-            break;
-        }
-        case op_set_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = std::move(vars[src]).set(value, 42);
-            break;
-        }
-        case op_erase_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = std::move(vars[src]).erase(value);
-            break;
-        }
-        case op_iterate: {
-            auto srcv = vars[src];
-            for (const auto& v : srcv) {
-                vars[dst] = vars[dst].set(v.first, v.second);
-            }
-            break;
-        }
-        case op_find: {
-            auto value = read<size_t>(in);
-            auto res   = vars[src].find(value);
-            if (res != nullptr) {
-                vars[dst] = vars[dst].set(*res, 42);
-            }
-            break;
-        }
-        case op_update: {
-            auto key  = read<size_t>(in);
-            vars[dst] = vars[src].update(key, [](int x) { return x + 1; });
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/map.cpp b/third_party/immer/extra/fuzzer/map.cpp
deleted file mode 100644
index eb650679e932..000000000000
--- a/third_party/immer/extra/fuzzer/map.cpp
+++ /dev/null
@@ -1,85 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/map.hpp>
-
-#include <array>
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-
-    using map_t = immer::map<char, int>;
-
-    auto vars = std::array<map_t, var_count>{};
-
-    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_set,
-            op_erase,
-            op_set_move,
-            op_erase_move,
-            op_iterate,
-            op_find,
-            op_update
-        };
-        auto src = read<char>(in, is_valid_var);
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_set: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].set(value, 42);
-            break;
-        }
-        case op_erase: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].erase(value);
-            break;
-        }
-        case op_set_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = std::move(vars[src]).set(value, 42);
-            break;
-        }
-        case op_erase_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = std::move(vars[src]).erase(value);
-            break;
-        }
-        case op_iterate: {
-            auto srcv = vars[src];
-            for (const auto& v : srcv) {
-                vars[dst] = vars[dst].set(v.first, v.second);
-            }
-            break;
-        }
-        case op_find: {
-            auto value = read<size_t>(in);
-            auto res   = vars[src].find(value);
-            if (res != nullptr) {
-                vars[dst] = vars[dst].set(*res, 42);
-            }
-            break;
-        }
-        case op_update: {
-            auto key  = read<size_t>(in);
-            vars[dst] = vars[src].update(key, [](int x) { return x + 1; });
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/set-gc.cpp b/third_party/immer/extra/fuzzer/set-gc.cpp
deleted file mode 100644
index 3b88c08f3c2d..000000000000
--- a/third_party/immer/extra/fuzzer/set-gc.cpp
+++ /dev/null
@@ -1,78 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/heap/gc_heap.hpp>
-#include <immer/refcount/no_refcount_policy.hpp>
-#include <immer/set.hpp>
-
-#include <array>
-
-using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
-                                       immer::no_refcount_policy,
-                                       immer::gc_transience_policy,
-                                       false>;
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-
-    using set_t =
-        immer::set<int, std::hash<char>, std::equal_to<char>, gc_memory>;
-
-    auto vars = std::array<set_t, var_count>{};
-
-    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_insert,
-            op_erase,
-            op_insert_move,
-            op_erase_move,
-            op_iterate
-        };
-        auto src = read<char>(in, is_valid_var);
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_insert: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].insert(value);
-            break;
-        }
-        case op_erase: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].erase(value);
-            break;
-        }
-        case op_insert_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = std::move(vars[src]).insert(value);
-            break;
-        }
-        case op_erase_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].erase(value);
-            break;
-        }
-        case op_iterate: {
-            auto srcv = vars[src];
-            for (const auto& v : srcv) {
-                vars[dst] = vars[dst].insert(v);
-            }
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/set.cpp b/third_party/immer/extra/fuzzer/set.cpp
deleted file mode 100644
index b25313d18cfc..000000000000
--- a/third_party/immer/extra/fuzzer/set.cpp
+++ /dev/null
@@ -1,70 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/set.hpp>
-
-#include <array>
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-
-    using set_t = immer::set<int>;
-
-    auto vars = std::array<set_t, var_count>{};
-
-    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_insert,
-            op_erase,
-            op_insert_move,
-            op_erase_move,
-            op_iterate
-        };
-        auto src = read<char>(in, is_valid_var);
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_insert: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].insert(value);
-            break;
-        }
-        case op_erase: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].erase(value);
-            break;
-        }
-        case op_insert_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = std::move(vars[src]).insert(value);
-            break;
-        }
-        case op_erase_move: {
-            auto value = read<size_t>(in);
-            vars[dst]  = vars[src].erase(value);
-            break;
-        }
-        case op_iterate: {
-            auto srcv = vars[src];
-            for (const auto& v : srcv) {
-                vars[dst] = vars[dst].insert(v);
-            }
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/vector-gc.cpp b/third_party/immer/extra/fuzzer/vector-gc.cpp
deleted file mode 100644
index 1faa729c5a72..000000000000
--- a/third_party/immer/extra/fuzzer/vector-gc.cpp
+++ /dev/null
@@ -1,104 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/heap/gc_heap.hpp>
-#include <immer/refcount/no_refcount_policy.hpp>
-#include <immer/vector.hpp>
-#include <immer/vector_transient.hpp>
-
-#include <array>
-
-using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
-                                       immer::no_refcount_policy,
-                                       immer::gc_transience_policy,
-                                       false>;
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-    constexpr auto bits      = 2;
-
-    using vector_t    = immer::vector<int, gc_memory, bits, bits>;
-    using transient_t = typename vector_t::transient_type;
-    using size_t      = std::uint8_t;
-
-    auto vs = std::array<vector_t, var_count>{};
-    auto ts = std::array<transient_t, var_count>{};
-
-    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
-    auto is_valid_index = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
-    };
-    auto is_valid_size = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
-    };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_transient,
-            op_persistent,
-            op_push_back,
-            op_update,
-            op_take,
-            op_push_back_mut,
-            op_update_mut,
-            op_take_mut,
-        };
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_transient: {
-            auto src = read<char>(in, is_valid_var);
-            ts[dst]  = vs[src].transient();
-            break;
-        }
-        case op_persistent: {
-            auto src = read<char>(in, is_valid_var);
-            vs[dst]  = ts[src].persistent();
-            break;
-        }
-        case op_push_back: {
-            auto src = read<char>(in, is_valid_var);
-            vs[dst]  = vs[src].push_back(42);
-            break;
-        }
-        case op_update: {
-            auto src = read<char>(in, is_valid_var);
-            auto idx = read<size_t>(in, is_valid_index(vs[src]));
-            vs[dst]  = vs[src].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take: {
-            auto src = read<char>(in, is_valid_var);
-            auto idx = read<size_t>(in, is_valid_size(vs[src]));
-            vs[dst]  = vs[src].take(idx);
-            break;
-        }
-        case op_push_back_mut: {
-            ts[dst].push_back(13);
-            break;
-        }
-        case op_update_mut: {
-            auto idx = read<size_t>(in, is_valid_index(ts[dst]));
-            ts[dst].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take_mut: {
-            auto idx = read<size_t>(in, is_valid_size(ts[dst]));
-            ts[dst].take(idx);
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}
diff --git a/third_party/immer/extra/fuzzer/vector.cpp b/third_party/immer/extra/fuzzer/vector.cpp
deleted file mode 100644
index b04cbcee870c..000000000000
--- a/third_party/immer/extra/fuzzer/vector.cpp
+++ /dev/null
@@ -1,82 +0,0 @@
-//
-// immer: immutable data structures for C++
-// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
-//
-// This software is distributed under the Boost Software License, Version 1.0.
-// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
-//
-
-#include "fuzzer_input.hpp"
-
-#include <immer/vector.hpp>
-
-#include <array>
-
-extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
-                                      std::size_t size)
-{
-    constexpr auto var_count = 4;
-    constexpr auto bits      = 2;
-
-    using vector_t =
-        immer::vector<int, immer::default_memory_policy, bits, bits>;
-    using size_t = std::uint8_t;
-
-    auto vars = std::array<vector_t, var_count>{};
-
-    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
-    auto is_valid_index = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
-    };
-    auto is_valid_size = [](auto& v) {
-        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
-    };
-
-    return fuzzer_input{data, size}.run([&](auto& in) {
-        enum ops
-        {
-            op_push_back,
-            op_update,
-            op_take,
-            op_push_back_move,
-            op_update_move,
-            op_take_move,
-        };
-        auto src = read<char>(in, is_valid_var);
-        auto dst = read<char>(in, is_valid_var);
-        switch (read<char>(in)) {
-        case op_push_back: {
-            vars[dst] = vars[src].push_back(42);
-            break;
-        }
-        case op_update: {
-            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
-            vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = vars[src].take(idx);
-            break;
-        }
-        case op_push_back_move: {
-            vars[dst] = std::move(vars[src]).push_back(12);
-            break;
-        }
-        case op_update_move: {
-            auto idx = read<size_t>(in, is_valid_index(vars[src]));
-            vars[dst] =
-                std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
-            break;
-        }
-        case op_take_move: {
-            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
-            vars[dst] = std::move(vars[src]).take(idx);
-            break;
-        }
-        default:
-            break;
-        };
-        return true;
-    });
-}